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olga2289 [7]
3 years ago
10

I need help with 19-25. PLEASE NEED ASAP!!

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
3 0

Answer:

That's just -6

Step-by-step explanation:

The 19 is smaller then the 25 so you gotta go back to the negatives, so do 25 - 19 but add a negative.

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3 years ago
The average human gestation period is 270 days with a standard deviation of 9 days. The period is normally distributed. What is
Anna35 [415]

Answer:

Probability that a randomly selected woman's gestation period will be between 261 and 279 days is 0.68.

Step-by-step explanation:

We are given that the average human gestation period is 270 days with a standard deviation of 9 days. The period is normally distributed.

Firstly, Let X = women's gestation period

The z score probability distribution for is given by;

         Z = \frac{ X - \mu}{\sigma} ~ N(0,1)

where, \mu = average gestation period = 270 days

            \sigma = standard deviation = 9 days

Probability that a randomly selected woman's gestation period will be between 261 and 279 days is given by = P(261 < X < 279) = P(X < 279) - P(X \leq 261)

         P(X < 279) = P( \frac{ X - \mu}{\sigma} < \frac{279-270}{9} ) = P(Z < 1) = 0.84134

         P(X \leq 261) = P( \frac{ X - \mu}{\sigma} \leq \frac{261-270}{9} ) = P(Z \leq -1) = 1 - P(Z < 1)

                                                           = 1 - 0.84134 = 0.15866

<em>Therefore, P(261 < X < 279) = 0.84134 - 0.15866 = 0.68</em>

Hence, probability that a randomly selected woman's gestation period will be between 261 and 279 days is 0.68.

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3 years ago
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Answer:

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So the inequality is : 60 ≤ x≤ 100.

Step-by-step explanation:

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Use co.patible numbers to find two estimates 73÷4,858
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Answer:

Step-by-step explanation:

X= 12

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3 years ago
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